KR820000137Y1 - Fin pass roll - Google Patents

Abstract

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Description

Fin Pass roll

1 to 3 are cross-sectional views of conventional pin path rolls.

4 to 9 are cross-sectional views of one embodiment of the present invention.

In the case of forming a pipe while bending a metal plate by cold roll forming method, it is generally bent sequentially during the pipe forming process, and the half-shaped plate is placed between the opposite free ends to support it. By passing the board through a series of pin-pass rolls having a roll-shaped disk-shaped roll, the pipe is molded by pushing the free ends of the tubular board in order and performing proper welding.

The present invention is directed to an improvement of this pin pass roll.

The pin path rolls were generally constituted by pin rolls that enter into and support the free ends of the base plate, which are bent in a semi-cylindrical shape, at the center thereof, and pin side rolls that form the base plates in cylindrical shapes on both sides of the pin rolls. Conventionally, the pin path roll shown in FIG. 1 and FIG. 2 was normally used, and the thing of the structure shown in FIG. 3 was also devised.

In the method of FIG. 1, the three divided into pin rolls (1) and pin side rolls (2) and (3) are normally integrally clamped by bolts or nut devices (4), and the like. 5) By receiving the driving force from the pin roll (1), the pin side roll (2), (3) and the like to rotate integrally with the roll drive shaft (5) to send the base plate (6) to the front.

This is divided into three parts for repairing or replacing only the shaft in which the pin roll or the pin side roll is worn, in order to improve the drawback when the conventional pin roll and the pin side roll and the like are integrated.

However, even in the manner shown in FIG. 1, the wear of the pin roll portion 7 and the pin side roll portion 8, in which the free end of which the base plate is half-cylinder strongly pressed against the pin roll and the pin side roll, is not solved.

Due to the irregular progress of wear and irregularity of the free end face of the board, the roller was impacted, and the rollers 7 and 8 were easily missing.

In addition, since the free end is skewed by sliding in the state in which the free end is strongly pressed against the roll, the free ends of the semi-cylindrical base 6 are completely engaged with each other when welding is performed. There was a drawback that it could not be satisfactorily welded because it could not be satisfactorily welded, or that the sliding surface could be damaged by sliding.

The structure of FIG. 2 is invented for the purpose of ameliorating the above drawbacks. This structure allows the pin roll 9 to rotate freely independently of the pin side rolls 10 and 11 in order to eliminate slippage caused by the main speed difference between the free section of the plate and the pin roll 9. I would have to.

This improvement improved the wear of 12 parts of the pin roll 9 in which the free end of the pin roll 9 and the base plate 6 were compressed, but the pin side roll 10, which is close to the pin roll 9, (( 11) and 13 parts of the pinside rolls 10 and 11 to which the free end of the base plate 6 is pressed, causing abrasion or cracking, which has been a problem that the end of the pinside roll is missing. .

In addition, the structure shown in FIG. 3 avoids abrasions generated at the end of the pin side rolls adjacent to the pin rolls shown in FIGS. 1 and 2 from the pin side rolls. In order to occur on the blood curved surface (穴 型 由 面), the pinned roll 15 having a pin 14 and the divided surface of the pin side roll 16, 17 is brought to the middle of the blood curved surface.

In the roll structure shown in FIG. 3, even if wear failure occurs in the blood curved surface portion 19 of the pin roll 15 adjacent to the pin 14 of the pin roll 15, only the inexpensive pin roll 15 is replaced. It is contemplated that the expensive exchange of pinside rolls shown in FIGS. 1 and 2 may have the advantage that it is not necessary.

However, in the roll structure of FIG. 3, the pin roll 15 is integrally clamped with the pinside rolls 16 and 17 by a bolt or nut device 4 or the like and has a large plate like the roll structure of FIG. 마모) Abrasion or cracking occurs in 18 parts of the pin roll 15 and 19 parts of the pin side rolls 16 and 17, which are strongly pressed together with the free end of the free end 6 and generate slippage, and this leads to wear failure. We cannot solve the problem fundamentally.

The present invention finds the cause of the wear on the blood roll surface of the pin roll and the pin roll which is strongly pressed to the free end of the base plate, and solves this to increase the life of the pin pass roll to improve the productivity of the pipe and At the same time, it is a pin pass roll which makes it possible to provide a pipe of good quality with excellent roundness.

In the conventional roll structure shown in FIG. 1 and FIG. 3, the pin roll is strongly pressed against the semi-cylindrical free end of the base plate, and the pin-side roll blood curved surface portion close to the pin roll shown in FIGS. And the pressure due to the resilient elasticity of the cylindrical base plate to the pin roll blood curved surface portion close to the pin shown in FIG.

The semi-cylindrical plate moves forward by the frictional force with the roll due to the rotation of the pin pass roll, but since the roll has different main speeds depending on the size of its diameter, There is always a difference in speed from the base plate, and a slip occurs between the roll and the base plate. Therefore, when the pin roll and the pin side roll having the free end of the semi-cylindrical base plate and the portion strongly pressed against each other are locked to the roll drive shaft, they are integrally clamped to those held on the roll drive shaft. A pin roller portion in contact with the semi-cylindrical free end of the base shown in Fig. 1, the blood side surface portion of the pin side roll in close proximity to the pin rolls of Figs. In the pin roll blood curved surface portion close to the pin of FIG. 3, a greater pressure than the base plate and slip due to the difference in the main speed with the base plate are generated, and their synergistic action causes wear and cracks on the roller, which proceeds. We found that wear and tear of roll and pinside roll occurred

The present invention reduces the main speed difference between the free end of the base plate and the roll part in contact with the free end of the base even if the pressure is applied to the roll from the free end of the semi-cylindrical base plate. It is intended to solve the wear loss of the roller by eliminating the slip, and divides the pin roll and the pin side roll into a blood-forming curved section for pipe forming, while the pin roll is different from the pin side roll and the roll drive shaft. The structure can be rotated freely at speed.

Hereinafter, the present invention will be described in detail.

4 to 9 are one embodiment of the present invention.

Referring to the example of FIG. 4, 6 denotes a semi-cylindrical shaped base plate, 20 denotes a pin roll, 21 and 22 pinside rolls, and 23 represents a sleeve.

The pin side rolls 21, 22 and the sleeve 23 are normally tightened integrally by the bolt or nut device 4 and rotate integrally under the rotational force of the roll drive shaft 5.

On the other hand, the pin roll 20 is located on the outer circumference of the sleeve 23 via the needle bearin 24 while being located between the pin side rolls 21 and 22 and independent of these. It can be rotated freely at different speeds.

The division of the pin roll 20 and the pin side rolls 21 and 22 is performed at the middle of the blood curved surface portion, and at the free end surface of the base plate at a position near the outer side of about 1/4 of the tube diameter. Most appropriate, but not necessarily so limited. The parts where the base plate and the roll are pressed most strongly are 26 parts of the pin 25 in contact with the free end of the base plate and 27 parts of the pin roll 20 proximate the pin 25 and these are part of the pin roll 20. As a result, they are out of the pin side rolls 21 and 22.

The pin side rolls 21, 22 and the lower roll 28 receive rotational force from the roll drive shaft to advance the base plate sequentially by frictional force with the rotating base plate and simultaneously form the base plate in a tubular shape. Play a role.

At this time, the pin side rolls 21, 22, and the lower 28 have a large diameter difference between the parts in contact with the base plate, so that even at the same rotational speed, a main speed is generated according to the difference in diameter, so that any part proceeds at the same speed. Slip due to the difference in speed is necessarily generated between the base plates.

However, the free end of the base plate to which the roll and base plate are pressed most strongly does not come into contact with the pinside roll held on these roll driving sides, and thus does not cause a large defect of the roll.

On the other hand, (26) and (27) parts of the pin roller, which the base plate is pressed most strongly, can be independently rotated at the circumferential speed at this speed in accordance with the free end of the base plate which advances at a constant speed while the diameter difference is small. The point portion of the end portion and the pin roll can give the base plate only a forming force for forming into a cylindrical shape with little slipping. Therefore, the pin roller contact portion with the free end of the base plate is pressurized from the base plate. However, since the slippage hardly occurs between the free end portion of the base plate and the contact portion of the pin roll, the 26 and 27 parts of the pin roller 20 are markedly worn. The above-mentioned drawbacks are alleviated, and the above-mentioned drawbacks of damage to the surface of the board due to slipping of the pin roll, skewing of the free end of the board, and sliding are all eliminated.

Next, the embodiment of FIG. 5 will be described. The difference from FIG. 4 is that the pin roll is located on the outer circumference of the sleeve 23 via the needle bearing 24 in the example of FIG. In contrast, in this embodiment, only the pin roll 28 is directly fitted to the outer periphery of the sleeve 29, and the sleeve acts as a sliding axis number, and the other structures are almost the same.

Therefore, the wearing effect produced by this embodiment is also almost the same as the embodiment of FIG. 4 described above.

Next, another embodiment of the present invention is shown in FIG. 6 and FIG. These have a structure in which the pin roll rotating independently of the pin side rolls and the roll driving shafts shown in FIGS. 4 and 5 is divided into three pins and a middle roll. In FIG. 6, 6 denotes a semi-cylindrical plate, 30 denotes a pin, 31 and 32 middle rolls, and 33 and 34 pinside rolls 35 are sleeves.

The pin side rolls 33, 34 and the sleeve 35 are normally tightened integrally by the bolt or nut device 4, and are rotated integrally by the rotational force on the roll driving side 5.

On the other hand, the pin 30 and the middle rolls 31 and 32 are located on the outer circumference of the sleeve 35 via the needle bearing 24.

The pin roll 36 having the pin 30 and the middle rolls 31 and 32 as a pair has a structure capable of freely rotating at different speeds independently of the pinside roll and the roll drive shaft. The other structure is the same as the embodiment shown in FIG. In this embodiment as well, the same effects as in Figs. 4 and 5 are shown, and the wear of the pins 30, the middle rolls 31, and 32 is remarkably reduced. All imperfections are eliminated.

In addition, there are 37 parts which caused slippage due to the difference in the circumferential speed and caused wear and dropping of the rolls, and the middle rolls 31 and 32 as the pin rolls 36 are the pin side rolls and the roll driving shaft. Independence from wear can significantly reduce wear, while the wear and frictional heat caused by slipping can be used for the middle rollers 31 and 32 by using materials rich in wear resistance and heat resistance. The life of the pass roll can be extended.

Moreover, by dividing into the pin side rolls 33, 34, the middle rolls 31, 32, and the pin 30, only the roll of the part which was not usable can also be used.

7 is different from the structure of FIG. 6 in that the pin 30 as the pin roll 36 and the middle rolls 31 and 32 are located on the outer circumference of the sleeve 35 via the needle bearing 24. In contrast, in the present embodiment, the pin roll 41 having the pin 38 and the middle rolls 39 and 40 as a pair is directly inserted into the outer circumference of the sleeve 42 so that the sleeve acts as a sliding axis number. The only difference is the structure of the guitar. Therefore, the effect produced by the present embodiment is the same as that of the embodiment of FIG. 6 described above.

In FIG. 4 and FIG. 7, the pin roll part adjacent to the pin side roll is acute.

Thus, the present embodiment showing the same operational effects as the embodiment shown in FIG. 4 and improving the damage resistance of the pin roll is shown in FIGS. 8 and 9.

The pin rolls 43, 49 and the pin side rolls 44, 45, 50, and 5l at the fan path roll end face are opposite to the pin roll and pin side at the outer circumferential side of the roll. A vertical plane VV 'is positioned at TT' at the split point of the blood cell curved surface of the roll, and the divided inner surface of the roll constitutes a vertical plane perpendicular to the roll driving axis 5.

In the roll structure shown in Figs. 8 and 9, since the pin roll does not have an acute portion at the portion adjacent to the pin side roll, the pin roll roll's damage resistance is improved and the life of the pin pass roll is increased.

Although the first embodiment of the present invention is shown in FIGS. 4 to 9, the present invention divides the pin roll and the pin side roll into a blood-forming curved section for pipe forming, while the pin roll is divided into a pin side roll and a roll drive shaft. It may be a structure that rotates independently from and is not limited to the above-described embodiment.

As described above, according to the present invention, the pin roll and the pinside roll may be prevented from wear and tear, and the long life of the pin pass roll may be provided, and the roundness of the pipe may be produced with good quality.

Claims (1)

In the pin pass roll used during the molding process of forming a pipe having a predetermined shape through a single stage or a multi stage roll stand, a pin roll 20 and a pin side roll ( The pin side rolls 21 and 22 are engaged by the roll driving shaft 5, and the pin rolls 26 are divided into the pipe forming blood curved surfaces. A pin path roll, characterized in that the structure to rotate independently from the pin side roll (21), (22) and the roll drive shaft (5).